猫从肌肉到脊髓颈段神经元的初级传入纤维投射
Projections of primary afferent fibres from muscle to neurones of the spinocervical tract of the cat.
作者信息
Hamann W C, Hong S K, Kniffki K D, Schmidt R F
出版信息
J Physiol. 1978 Oct;283:369-78. doi: 10.1113/jphysiol.1978.sp012506.
Abstract
- Micro-electrode recordings were made from axons in the spinocervical tract of decerebrate-spinal cats. 2. The effect of electrical stimulation of afferent fibres in muscle nerves was examined. 3. Stimulation of group III fibres in muscle nerves excited hair only and hair and pressure units in the spinocervical tract. Hair and pressure units also responded to electrical stimulation of group IV fibres. 4. Units of the spinocervical tract excited by stimulation of muscle nerves had receptive fields in the skin overlying the relevant muscles. 5. Stimulation of group III fibres in muscle nerves produced long lasting inhibition of spinocervical tract units. In two such units the inhibitory action of afferent myelinated fibres was enhanced by increasing the stimulus strength so that group IV fibres were recruited.
摘要
- 对去大脑脊髓猫的脊髓颈髓束中的轴突进行微电极记录。2. 研究了电刺激肌肉神经中传入纤维的效果。3. 刺激肌肉神经中的Ⅲ类纤维仅兴奋脊髓颈髓束中的毛细胞以及毛细胞和压力感受器单位。毛细胞和压力感受器单位也对Ⅳ类纤维的电刺激有反应。4. 由肌肉神经刺激所兴奋的脊髓颈髓束单位在相关肌肉上方的皮肤中有感受野。5. 刺激肌肉神经中的Ⅲ类纤维对脊髓颈髓束单位产生持久抑制。在两个这样的单位中，通过增加刺激强度增强了传入有髓纤维的抑制作用，从而募集了Ⅳ类纤维。
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Cord cells responding to fine myelinated afferents from viscera, muscle and skin.脊髓细胞对来自内脏、肌肉和皮肤的有髓鞘细传入纤维产生反应。
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Effects of descending impulses on transmission through the spinocervical tract.下行冲动对通过脊髓颈段传导束传导的影响。
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Responses of group IV afferent units from skeletal muscle to stretch, contraction and chemical stimulation.来自骨骼肌的IV组传入单位对拉伸、收缩和化学刺激的反应。
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